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Literature on the management of diabetes in competitive sports focuses on the difficulties with balancing energy and insulin intake during periods of strenuous exercise. [1] The following is a list of notable sportspeople who have had diabetes during their careers. It does not include athletes diagnosed after retirement.
Blood doping is the injection of red blood cells, related blood products that contain red blood cells, or artificial oxygen containers. This is done by extracting and storing one's own blood prior to an athletic competition, well in advance of the competition so that the body can replenish its natural levels of red blood cells, and subsequently injecting the stored blood immediately before ...
Beta blockers are any of a group of drugs that decrease the rate and force of heart contractions and lower high blood pressure. Beta blockers help athletes in sports such as rifle shooting or archery where nervousness can harm performance, and they are only banned in these sports. [ 2 ]
In competitive sports, doping is the use of banned athletic performance-enhancing drugs (PEDs) by athletes, as a way of cheating.As stated in the World Anti-Doping Code by WADA, doping is defined as the occurrence of one or more of the anti-doping rule violations outlined in Article 2.1 through Article 2.11 of the Code. [1]
Therefore, beta blockers are to be used cautiously in diabetics. [47] A 2007 study revealed diuretics and beta blockers used for hypertension increase a patient's risk of developing diabetes mellitus, while ACE inhibitors and angiotensin II receptor antagonists (angiotensin receptor blockers) actually decrease the risk of diabetes. [48]
Overdose of lipophilic beta-1 blocker can disturb neurologic functioning, which eventually lead to altered mental states. [5] To mitigate the toxicity of Beta-1 blocker, glucagon, salts like calcium and sodium bicarbonate, magnesium sulfate are used to reverse beta-1-blocker effect and treating hypotension respectively. [5]
In patients with type 1 diabetes mellitus, as plasma glucose levels fall, insulin levels do not decrease – they are simply a passive reflection of the absorption of exogenous insulin. Also, glucagon levels do not increase. Therefore, the first and second defenses against hypoglycemia are already lost in established type 1 diabetes mellitus. [2]
Additionally, beta 1 blockers can affect beta 2 receptors, particularly at high doses, and hence should not be administered to patients with peripheral vascular disease or diabetes mellitus as they may cause vasoconstriction or a delayed hypoglycaemic response, respectively. [4]